2G ems initial

2024-03-13 09:30:40 +08:00
commit eed6460ad2
1234 changed files with 419571 additions and 0 deletions
--- a/include/nettle/salsa20.h
+++ b/include/nettle/salsa20.h
@@ -0,0 +1,114 @@
+/* salsa20.h
+
+   The Salsa20 stream cipher.
+
+   Copyright (C) 2012 Simon Josefsson
+   Copyright (C) 2001 Niels Möller
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef NETTLE_SALSA20_H_INCLUDED
+#define NETTLE_SALSA20_H_INCLUDED
+
+#include "nettle-types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Name mangling */
+#define salsa20_set_key nettle_salsa20_set_key
+#define salsa20_128_set_key nettle_salsa20_128_set_key
+#define salsa20_256_set_key nettle_salsa20_256_set_key
+#define salsa20_set_nonce nettle_salsa20_set_nonce
+#define salsa20_crypt nettle_salsa20_crypt
+#define _salsa20_core _nettle_salsa20_core
+
+#define salsa20r12_crypt nettle_salsa20r12_crypt
+
+/* Alias for backwards compatibility */
+#define salsa20_set_iv nettle_salsa20_set_nonce
+
+/* In octets.*/
+#define SALSA20_128_KEY_SIZE 16
+#define SALSA20_256_KEY_SIZE 32
+#define SALSA20_BLOCK_SIZE 64
+#define SALSA20_NONCE_SIZE 8
+#define SALSA20_IV_SIZE SALSA20_NONCE_SIZE
+
+/* Aliases */
+#define SALSA20_MIN_KEY_SIZE 16
+#define SALSA20_MAX_KEY_SIZE 32
+#define SALSA20_KEY_SIZE 32
+
+#define _SALSA20_INPUT_LENGTH 16
+
+struct salsa20_ctx
+{
+  /* Indices 1-4 and 11-14 holds the key (two identical copies for the
+     shorter key size), indices 0, 5, 10, 15 are constant, indices 6, 7
+     are the IV, and indices 8, 9 are the block counter:
+
+     C K K K
+     K C I I
+     B B C K
+     K K K C
+  */
+  uint32_t input[_SALSA20_INPUT_LENGTH];
+};
+
+void
+salsa20_128_set_key(struct salsa20_ctx *ctx, const uint8_t *key);
+void
+salsa20_256_set_key(struct salsa20_ctx *ctx, const uint8_t *key);
+
+void
+salsa20_set_key(struct salsa20_ctx *ctx,
+		size_t length, const uint8_t *key);
+
+void
+salsa20_set_nonce(struct salsa20_ctx *ctx, const uint8_t *nonce);
+  
+void
+salsa20_crypt(struct salsa20_ctx *ctx,
+	      size_t length, uint8_t *dst,
+	      const uint8_t *src);
+
+void
+salsa20r12_crypt(struct salsa20_ctx *ctx,
+		 size_t length, uint8_t *dst,
+		 const uint8_t *src);
+
+void
+_salsa20_core(uint32_t *dst, const uint32_t *src, unsigned rounds);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_SALSA20_H_INCLUDED */